YouTuber Big Clive bought a "UV disinfection lamp" on eBay. He tested it first by turning it on and aiming it at the back of his hand for a few seconds and then sniffing his hand for "skin damage." There was no odor, which was a good sign that it's not really producing UV-C radiation, at least not in sufficient quantities to work as a germicide. He then took it apart to see what was inside and found "standard near UV LEDs." He says it is simply a "cheap near-UV disco light commonly sold on eBay in various color options… that's a bit naughty."